The Packing Assembly, cataloged under National Stock Number 5330-00-442-5793, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rms - Mitchel Field. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-00-442-5793 |
| Primary Part Number | 0321-6 |
| Item Name | Packing Assembly |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Lockheed Martin Corporation Div Rms - Mitchel Field |
| Status | ACTIVE |
| Intermediate Ring Quantity | 6 |
| Outside Diameter | 1.187 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | SQUARE/RECTANGULAR TOP RING |
| Cross-Sectional Shape Style | ANGLE BOTTOM RING |
| Cross-Sectional Shape Style | OVAL INTERMEDIATE RING |
| Inside Diameter | 0.812 INCHES NOMINAL IN |
| Height | 1.062 INCHES MINIMUM AND 1.188 INCHES MAXIMUM IN |
| Material | CORK AND PLASTIC INTERMEDIATE RING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 0321-6 PRIMARY | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
NSN 5330-00-442-5793 is a Packing Assembly, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-442-5793 has 1 manufacturer part number on file: 0321-6 (Lockheed Martin Corporation Div Rms - Mitchel Field).
2 possible matches (shared part number, not a government interchangeability claim): 5310-01-644-9470, 1005-01-658-5267. Verify interchangeability with system specifications before substitution.
Key specifications for 0321-6: Intermediate Ring Quantity: 6; Outside Diameter: 1.187 INCHES NOMINAL IN; Cross-Sectional Shape Style: SQUARE/RECTANGULAR TOP RING; Cross-Sectional Shape Style: ANGLE BOTTOM RING. 8 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.